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Here is a collection of some of the most often used mechanical units. Both SI
(metric) and SAE (English) units are given. There are two fundamental types of units: base units and derived units. Base
units include meter, foot, kilogram, second, etc. Derived units involve a combination
of base units, such as square meter, kilometer/second, etc.
| Length |
meter |
m |
foot |
ft |
| Area |
square meter |
m2 |
square foot |
ft2 |
| Volume |
cubic meter |
m3 |
cubic foot |
ft3 |
| Mass |
kilogram |
kg |
pound mass |
lb |
| Density |
kilogram/cubic meter |
kg/m3 |
pound/cubic foot |
lb/ft3 |
| Time |
second |
s |
second |
s |
| Speed |
kilometer/second |
km/s |
foot/second |
ft/s |
| Force |
newton |
N |
pound-force |
lbf |
| Pressure |
pascal |
P |
pound/square foot |
lb/ft2 |
| Plane Angle |
radian |
rad |
degree |
° |
| Solid Angle |
steradian |
ster |
square degree |
deg2 |
| Momentum |
kilogram*meter/second |
ρ |
pound*foot/second |
ρ |
| Torque |
newton*meter |
t |
pound-force*foot |
t |
| Young's modulus |
pascal |
E |
pascal |
E |
| Kinetic energy |
joule |
K |
watt*second |
K |
| Potential energy |
joule |
U |
watt*second |
U |
Here is the NIST document entitled The International System of Units (SI) –Conversion Factors for General
Use
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